onsemi P2779A
The P2779A is a versatile spread spectrum frequency modulator designed specifically for mobile and digital camera and other digital video and imaging applications. The P2779A reduces electromagnetic interference (EMI) at the clock source, which provides system−wide reduction of EMI of all clock dependent signals. The P2779A allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations.| Part No. | P2779A |
|---|---|
| Datasheet | P2779A Download |
| Manufacturer |  onsemi |
| Description | Low-Cost Notebook EMI Reduction IC |
| Buy | Stock & Price |
DESCRIPTION
The P2779A uses the most efficient and optimized modulation profile approved by the FCC. The P2779A modulates the output of a single PLL in order to spread the bandwidth of a synthesized clock and, more importantly, decreases the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the typical narrow−band signal produced by oscillators and most frequency generators. Lowering EMI by increasing a signal’s bandwidth is called spread spectrum clock generation.APPLICATIONS
The P2779A is targeted toward mobile 3D graphics chip set applications.FEATURES
● Provides up to 15 dB of EMI Suppression● FCC Approved Method of EMI Attenuation
● Generates a 1X Low EMI Spread Spectrum Clock of the Input Frequency
● Operates between 20 MHz and 38 MHz Input Frequency Range
● External Loop Filter for Spread Percentage Adjustment
● Spreading Ranges from ±0.25% to ±2.5%
● Ultra Low Cycle−to−Cycle Jitter
● Zero−Cycle Slip at Small Deviations
● 3.3 V Opera...
